Wall-mountable spray head unit
A wall-mountable spray head unit ( 11 ) is described. The spray head unit comprises a rotatable spray head assembly ( 8 ) which comprises a spray manifold ( 18 ) rotatable about a first axis ( 17 ), a spray nozzle ( 19 ) supported by the spray manifold and orientated to deliver a mist of fire-suppressant material radially in a plane in a plane defined by the first axis and a second axis which is perpendicular to the first axis. The spray head unit includes a sensor ( 20 ) and/or an interface ( 35 ) for receiving a sensor signal from an external sensor and/or a control signal from an external controller. The rotatable spray head assembly does not support a sensor.
1 . A wall-mountable spray head unit comprising:
a rotatable spray head assembly which comprises:
a spray manifold rotatable about a first axis; and
a spray nozzle supported by the spray manifold and orientated to deliver a mist of fire-suppressant material radially in a plane defined by the first axis and a second axis which is perpendicular to the first axis;
a non-rotatable faceplate that, when the spray head unit is installed in a wall, is parallel to the wall and the first axis;
at least one sensor fixed in the faceplate;
wherein the rotatable spray head assembly does not support a sensor;
and wherein the faceplate comprises:
an aperture through which the spray nozzle protrudes when delivering the mist; and
a faceted projection comprising at least one face, wherein the at least one face is orientated off normal to the faceplate for facing a respective side of a room and supports one or more sensors oriented normal to the face.
2 . The spray head unit of claim 1 , wherein the spray nozzle is configured to form a fan of water mist in the plane.
3 . The spray head unit of claim 2 , wherein the fan allows the Coanda effect to carry the mist spray.
4 . The spray head unit of claim 2 , wherein the spray nozzle is configured to deliver the mist of fire-suppressant material in arc in the plane of at least 2×α°, wherein α lies between 25 and 60.
5 . The spray head unit of claim 4 , wherein α lies between 25 and 40.
6 . The spray head unit of claim 5 , wherein α is 32.5.
7 . The spray head unit of claim 1 , the spray head unit comprising:
two or more sensors; and
two or more faces orientated off normal to the faceplate for facing different sides of a room, each face supporting one or more sensors oriented normal to the face.
8 . The spray head unit of claim 1 , configured to be mountable to a wall, wherein the spray nozzle is directable perpendicularly to the wall.
9 . The spray head unit of claim 1 , wherein the spray nozzle is configured such that the mist consists of droplets of 40 to 120 microns in diameter.
10 . The spray head unit of claim 1 , wherein the rotatable spray head assembly is able to sweep through an angular range around the first axis of at least 120° while delivering mist.
11 . The spray head unit of claim 1 , wherein the rotatable spray head assembly is able to sweep the assembly up to ±β° while delivering mist, where β°=0 is perpendicular to the aperture and β is at least 75°.
12 . The spray head unit of claim 1 , wherein the rotatable spray head assembly includes a range of deployed positions for delivering mist and a parked position in which the spray nozzle is concealed.
13 . The spray head unit of claim 1 , wherein the rotatable spray head assembly includes a set position, which differs from a parked position, for readying the rotatable spray head assembly for movement to a deployed position for delivering mist.
14 . A wall-mounted spray head unit comprising:
the spray head unit of claim 1 mounted at a height about halfway between floor and ceiling of a room.
15 . The wall-mounted spray head unit of claim 14 , wherein the room has a height between the floor and ceiling is 2.5 m.
16 . A wall-mounted spray head unit comprising:
the spray head unit of claim 1 mounted at a height in a range between 1 m and 2m from the floor a room.
17 . The spray head unit of claim 1 , further comprising:
a first controller.
18 . A system comprising:
the spray head unit of claim 17 ; and
a second controller in communication with the first controller.